AQA BIOL2 Biology Unit 2 Exam - 26th May 2011

I think the main concept is about a preventation in a water potential gradient. The other user talked about waterproof = no water potential gradient. Stomata closed = no water potential gradient, therefore less loss.
I think i just mentioned w.p gradient reduced, so less loss of water :smile:

I said waterproof so doesn't evaporate from the surface of the leaf as much... D:

Reply 1741

??????????????????

8

Original post by jsmith6131

will I get the mark for stating % difference as 52.2 because I used 9.2 NOT 9

One for the working out and you might get another if there AQA gives a range.

ok thanks

Original post by Kisskoli

some animal cells have cell walls.... its cellulose cell walls that are only in plants?

Animal cells never, ever, everrrrrrr have cell walls. ever.

Reply 1744

TlanTlan

6

Original post by specialapple

animal cells never, ever, everrrrrrr have cell walls. Ever.

eveeerrrrrr

Reply 1745

davis053

As for the structure in plants but not Animals it was
Chloroplasts and starch store?

Reply 1746

M | k e

Original post by davis053

As for the structure in plants but not Animals it was
Chloroplasts and starch store?

Tbh seemed to be most of the stuff on the diagram, both them are right.

I went for Cell Wall + Chloroplasts.

Reply 1747

EffKayy

16

Original post by M | k e

Tbh seemed to be most of the stuff on the diagram, both them are right.

I went for Cell Wall + Chloroplasts.

Me tooo
The first set of pages was awesome
then came onto the hsw questions
:eek:

Reply 1748

M | k e

Original post by EffKayy

Me tooo
The first set of pages was awesome
then came onto the hsw questions
:eek:

Yeah, so many random 2 mark questions about nothing interesting. I got bored so counted them and there was 26 lol.

Knowledgey questions seemed pretty reasonable though :tongue:

.

Reply 1749

SpecialApple

1

Original post by TlanTlan

eveeerrrrrr

Hahahaha OH, YOU! :ahee:

Reply 1750

username607202

17

Original post by EffKayy

Me tooo
The first set of pages was awesome
then came onto the hsw questions
:eek:

I didn't realise I completed question 2. I was writing some answers down for question 3 and I checked the time and about 15 minutes had gone, I was like that was quick, when did I do question 2? :s-smilie:

I went back and checked and realised question 2 was worth 4 marks, like wtf?!

Reply 1751

EffKayy

16

Original post by Wick3d

I didn't realise I completed question 2. I was writing some answers down for question 3 and I checked the time and about 15 minutes had gone, I was like that was quick, when did I do question 2? :s-smilie:

I went back and checked and realised question 2 was worth 4 marks, like wtf?!

Ohh :L
LOL
I'm quite worried in terms of the markscheme, loads of people here have written different answers for the same question
LOL

Reply 1752

cherri3

2

Original post by Unbiased Opinion

I know what you mean... I would hate to ever think I'd done well then not. That's never happened to me but that would be awful!

Haha, thanks. :smile:

I'd rather Bio was in the morning but ahh well.

I have Chem on Fri then French on the 6th, joy. :p:

Tomorrow is my 1st exam. Dw, revision will be done soon, no more for like 7 months! :smile:

Sorry for the late reply thought it was time to actually start revising
hahaa.. how did you find it? I thought i went okay.. :smile:

Reply 1753

M | k e

Original post by Wick3d

I didn't realise I completed question 2. I was writing some answers down for question 3 and I checked the time and about 15 minutes had gone, I was like that was quick, when did I do question 2? :s-smilie:

I went back and checked and realised question 2 was worth 4 marks, like wtf?!

Can't even remember what question 2 was about > :biggrin:

.

Oxygen dissociation curve page was only 5 marks too, and like 3 of them were tissue fluid :tongue:

.

Reply 1754

M | k e

Original post by EffKayy

Ohh :L
LOL
I'm quite worried in terms of the markscheme, loads of people here have written different answers for the same question
LOL

Which question(s)? I'll have a go > :biggrin:

, probably different to everyone else :biggrin:

.

Reply 1755

SoftMusk

10

I just feel like i've failed....ugh well gotta get back to chem revision...was not looking forward to bio exam :[ I wanna know how I've done with like an unofficial markscheme or w/e atleast i won't be in for a shock of how crappy ive done

Reply 1756

EffKayy

16

Original post by M | k e

Which question(s)? I'll have a go > :biggrin:

, probably different to everyone else :biggrin:

.

LOL
why B has a lower change in mass or something
i basically wrote about a reduced water potential gradient, thus losing less water etc..

Reply 1757

M | k e

Original post by EffKayy

LOL
why B has a lower change in mass or something
i basically wrote about a reduced water potential gradient, thus losing less water etc..

Oh gah that one I just wrote alotttt of different stuff haha.

Went for some stomata covered by grease so water will take longer to diffuse out, also said the actual thickness of the leaf will be increased, increasing diffusion pathway so water loss is reduced through the leaf. And put less light will be able to be absorbed (no idea if this is true :P) so less photosynthesis will be taking place, hence less exchange gases required and stomata can close. And about water potential.

Was a "**** it go for a mark :biggrin:

" question :smile:

.

Reply 1758

biologyunit1may16

Original post by SoftMusk

I just feel like i've failed....ugh well gotta get back to chem revision...was not looking forward to bio exam :[ I wanna know how I've done with like an unofficial markscheme or w/e atleast i won't be in for a shock of how crappy ive done